add syncthing on genepi

hosts/genepi/default.nix

@@ -21,6 +21,7 @@
     ./network.nix
     ./nginx.nix
     ./persistence.nix
+    ./syncthing.nix
     ./taskchampion.nix
 
     inputs.home-manager.nixosModules.home-manager

hosts/genepi/syncthing.nix

@@ -0,0 +1,45 @@
+{
+  config,
+  ...
+}:
+let
+  user = "rpqt";
+  home = config.users.users.${user}.home;
+in
+{
+  services.syncthing = {
+    enable = true;
+    user = user;
+    group = "users";
+    dataDir = home;
+    configDir = "${home}/.config/syncthing";
+    openDefaultPorts = true;
+    overrideDevices = true;
+    overrideFolders = true;
+    settings = {
+      devices = {
+        "haze" = {
+          id = "QUX6KGF-7KNFTGD-RAX5OWC-NFQGRNK-S2TC2DQ-DQRWDTK-KMBTQXT-EVNRDQG";
+        };
+        "pixel-7a" = {
+          id = "IZE7B4Z-LKTJY6Q-77NN4JG-ADYRC77-TYPZTXE-Q35BWV2-AEO7Q3R-ZE63IAU";
+        };
+      };
+      folders = {
+        "Documents" = {
+          path = "${home}/Documents";
+          devices = [
+            "haze"
+          ];
+        };
+        "Music" = {
+          path = "${home}/Media/Music";
+          devices = [
+            "haze"
+            "pixel-7a"
+          ];
+        };
+      };
+    };
+  };
+}